/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements. See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership. The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the  "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
/*
 * $Id$
 */
package wx.xml.xalan.xalan.processor;

import org.xml.sax.Attributes;

import javax.xml.transform.TransformerConfigurationException;
import javax.xml.transform.TransformerException;

import wx.xml.xalan.xalan.templates.Stylesheet;
import wx.xml.xalan.xalan.templates.StylesheetComposed;
import wx.xml.xalan.xalan.templates.StylesheetRoot;

/**
 * TransformerFactory for xsl:stylesheet or xsl:transform markup.
 *
 * @xsl.usage internal
 * @see <a href="http://www.w3.org/TR/xslt#dtd">XSLT DTD</a>
 * @see <a href="http://www.w3.org/TR/xslt#stylesheet-element">stylesheet-element in XSLT Specification</a>
 */
public class ProcessorStylesheetElement extends XSLTElementProcessor {
    static final long serialVersionUID = -877798927447840792L;

    /**
     * Receive notification of the start of an strip-space element.
     *
     * @param handler    The calling StylesheetHandler/TemplatesBuilder.
     * @param uri        The Namespace URI, or the empty string if the
     *                   element has no Namespace URI or if Namespace
     *                   processing is not being performed.
     * @param localName  The local name (without prefix), or the
     *                   empty string if Namespace processing is not being
     *                   performed.
     * @param rawName    The raw XML 1.0 name (with prefix), or the
     *                   empty string if raw names are not available.
     * @param attributes The attributes attached to the element.  If
     *                   there are no attributes, it shall be an empty
     *                   Attributes object.
     */
    public void startElement(
        StylesheetHandler handler, String uri, String localName, String rawName, Attributes attributes)
        throws org.xml.sax.SAXException {

        super.startElement(handler, uri, localName, rawName, attributes);
        try {
            int        stylesheetType = handler.getStylesheetType();
            Stylesheet stylesheet;

            if (stylesheetType == StylesheetHandler.STYPE_ROOT) {
                try {
                    stylesheet = getStylesheetRoot(handler);
                } catch (TransformerConfigurationException tfe) {
                    throw new TransformerException(tfe);
                }
            } else {
                Stylesheet parent = handler.getStylesheet();

                if (stylesheetType == StylesheetHandler.STYPE_IMPORT) {
                    StylesheetComposed sc = new StylesheetComposed(parent);

                    parent.setImport(sc);

                    stylesheet = sc;
                } else {
                    stylesheet = new Stylesheet(parent);

                    parent.setInclude(stylesheet);
                }
            }

            stylesheet.setDOMBackPointer(handler.getOriginatingNode());
            stylesheet.setLocaterInfo(handler.getLocator());

            stylesheet.setPrefixes(handler.getNamespaceSupport());
            handler.pushStylesheet(stylesheet);
            setPropertiesFromAttributes(handler, rawName, attributes,
                handler.getStylesheet());
            handler.pushElemTemplateElement(handler.getStylesheet());
        } catch (TransformerException te) {
            throw new org.xml.sax.SAXException(te);
        }
    }

    /**
     * This method can be over-ridden by a class that extends this one.
     *
     * @param handler The calling StylesheetHandler/TemplatesBuilder.
     */
    protected Stylesheet getStylesheetRoot(StylesheetHandler handler) throws TransformerConfigurationException {
        StylesheetRoot stylesheet;
        stylesheet = new StylesheetRoot(handler.getSchema(), handler.getStylesheetProcessor().getErrorListener());

        if (handler.getStylesheetProcessor().isSecureProcessing())
            stylesheet.setSecureProcessing(true);

        return stylesheet;
    }

    /**
     * Receive notification of the end of an element.
     *
     * @param handler   non-null reference to current StylesheetHandler that is constructing the Templates.
     * @param uri       The Namespace URI, or an empty string.
     * @param localName The local name (without prefix), or empty string if not namespace processing.
     * @param rawName   The qualified name (with prefix).
     */
    public void endElement(
        StylesheetHandler handler, String uri, String localName, String rawName)
        throws org.xml.sax.SAXException {
        super.endElement(handler, uri, localName, rawName);
        handler.popElemTemplateElement();
        handler.popStylesheet();
    }
}
